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Subject
- photometry8,384
- optical astronomy4,769
- galaxies4,218
- infrared photometry3,704
- spectroscopy3,103
- radial velocity2,257
- surveys2,180
- wide-band photometry2,081
- radio astronomy1,930
- chemical abundances1,793
- variable stars1,674
- redshifted1,646
- multiple stars1,457
- x-ray sources1,419
- open star clusters1,404
- infrared astronomy1,259
- infrared sources1,234
- galaxy clusters1,202
- radio sources1,084
- quasars1,067